Fountain pen



` T. KOVCS.

FOUNTMN PEN.

APPLICAHQN man sim". 13, 1,920.

Pafnte Aug. 15 E922@ e [WW if UNITED STATES.

PATENT ,oFFlcE.

4'.LHnoioon xovcs, OFBERLTN, GERMANY.

- FOUNTAIN PEN.

Specification of`Letters Patent.

Application led September 18, 1920. Serial'No. 410,030.

I To all whom t may concern.'

1919, and in Hungary Jan. 23,' 1919); of

which the following is a specification.

Infountain-pens the ink does not flow out with suilicient uniformity. According to this invention the uniform outflow of they ink is ensured by means o f a special capillary space designed tol receive the excess of ink which has flowed out of the ink reservoir. This compensating space supplies the ink gradually and absolutely uniformly to the channels which conduct the ink to the nib of the` pin. The compensating space communicates continuously lwith the atmosphere and serves further for conducting auxiliary air to the ink reservoir.

A fountain pen with such a device is not only well adapted for writing purposes but can also serve as drawing pen for drawing long lines of 'uniformv thickness. mouth piece is made removable it can be replaced by av mouthpiece for the drawing of lines. of diierentthickness. The fountain pen is properly ensured against drying up of the With eachfountain pen several mouth piecesare sold.

For the drawing of very large lines -a mouth piece is used which has a capillary boring at its axis and capillary notches atthe end designed. to distribute the ink uniformly over the end part which is thus supplied with ink automatically without the assistance of any mechanical device. For the drawing of thin lines a mouth piece is used which is adapted to draw very sharp lines and which is securely conducted by the T- square., triangle or any other auxiliary device. Y

With this object in View the mouth piece is very wide in one direction and very thin in a direction perpendicular thereto, and it is provided with a separate insertion which is essentially smaller than the above mentioned width. This insertion piece has edges yat its mouth which determine through their distance from one another the. thickness of the lineI to be drawn,'said edges standing parallel the guiding sur faces,

If the In the accompanying drawings the inventlonis shown by way of example Patentea Aug.1i5, 1922.

Fig. 1 showsin longitudinal section an improved fountaln pen with the, mouth piece designed for the drawing of thin lines.

Fig. 2 is a side viewof the mouth piece.

v Fig. 3 is a section on line A- Fig. 4 is a section on line C-D of Fig. 1, Fig. 5 is a section on line E-F, Figs. 6 and 7 represent in section and seen from below a mouth piece designed for.

the drawing of thick lines.l 4

In the hollow pen holder aa piece b is inserted whichv has a flange y designed to close the open end of the holder. This piece `has a boring with capillary lateral slots g (Figs. l and 4). At the inner end of the piece b a ring k is-provided which bears against the inner wall of the hollow pen holder a. This ring lc has a slot i which .forms an opening through which'the capillary space f between the piece b and the inner wall of the pen holder a is connected with the' ink reservoir 2. Near ,the upper" end of the pen-holder a an openlng .s is

provided in its wall which communicatesl with the space f, said space being` enlarged which communicates with the boring .It of.

the piece b. v

Fig 1 shows a mouth vpiece c for the drawing of thin lines. The space f forms the compensating spacel hereinbefore mentioned.

Owing to the capillary eifect of the compensating space f, the ink which is pressed out of the reservoir e, for example through increase of pressure|` into the. air space which is not filled with liquid'and which would be inexcess of the ink which iills the outiow channel n respectively the channel t of the mouth-piecec, issucked into the compensating space to be used according to requirement; In order to make the supply of lnk from the compensating space f asgradual as possible the space f is .narrowed towards its upper end so that', 'with the increasing pressure of the ink in lthe compensa-ting space f, the capillary action increases also whereby the increase of force due to the greater outiow of ink is compensated by the increase of resistance.. The long and I very narrow slots g ot the'fpiece @extending illary action of the space d is reduced lthrough said space being enlarged. The

opening s cannotbe clogged by dried ink as no ink can get at said opening. As this opening a is very small'it can scarcely serve to balance the pressure between the airy in the space f and the outer air so that the air required for pressing the ink out of the reservoir :a has to be taken Jfrom the comf pensating space 7@ wherebyv the' evaporation and the drying up of the ink in said reservoir is prevented as much as possible. For this purpose the slot e'- in the ring k of the piece is used. The air which flows from the space f through the slot i into the ing reservoir .e must pass through a cap'- illary groove j. ,As this capillary groove 7' is even then filled with ink if the level oit the ink in the reservoir a stands below said capillary groove, only very small bubbles of air can pass through said capillary groove j; consequently the variations ci pressure resulting from the supply of air to the ink reservoir are reduced to the minimum. rlllhe compensating space f could, instead of beingY arranged 1n longitudinal direction upon the pieren, be arranged in transverse direction or it could be spiral shaped. The boring n in the extension m is capillary and so are the' borings t of the mouth piece c .to be placed upon said-extension m.

The mouth piece c shown in Figs. 1 to 3 is of a small cross section and tongue-shaped.

ln a section perpendicular to that ci Fig. V1`

said piece is however comparatively large and it has inclined surfaces p upon either side (Fig. 2).- These inclined surfaces p serve for guiding the mouth piece along a "il square, "triangular 'or similar auxiliary device. The mouth piece" is thus ensured against accidental movement so that a sharp line is drawn; As can be seen from Fig. 2,

the nibr inserted into the end of the mouth piece c is sharpened lilies, chisel. 'The section shown in. Fig. Al.','whichy is taken at an angle of 90 with regard to Fig. 2, shows the, sharp edges r which are thus formed lying.

in the' direction ofthe surfaces p. 4llhe thiclmess of the yline to be drawn is determinedby'the distance between 'said edges r.

lf particularly thiol@ lines have to be drawn, a mouthpiece is used which'is constructedvas shown in Figs. 6 and 7. The body lv of this mouth piece has at. its inner end a conical body a which ts upon the eX- tension m of ,the pen holder. From this boring a a central capillary boring ld Maase@ `with ink by means of auxiliary .devices whilst, owing to the special `construction of the mouth piece o and to the ca illary boring t in connection with the capll ary notches w lthe improved mouth piece is automatically supplied with ink when it moves over the drawing sheet.

1 claim 1. Fountain pen comprisingin combination with a hollow pen holder serving as an y ink reservoir, a body inserted in said pen holder and stopping the open end the same being of smaller diameter than said pen holder so that between the outer surface of .which body and the inner wall of the pen holder a separate capillary'space isY formed which is connected on the one hand i with the ink reservoir and on the other hand with the atmosphere, said capillary space extendin almost-over the entire surface ofsaid bo y and getting narrower towards the outer end so that the capillary action inl l tion of a pen or oi a device for drawing creases, and a mouth piece for'the receplines.

2. Fountain en comprising in combination with a hol ow .pen holder serving as an ink reservoir, a body inserted in said pen -holder and stopping the open end the same being of smaller diameter than lsaid pen holder so of which body and the inner wall of the pen holder a separate capillary space is formed which is connectedfon the one hand that between the outer surface with the ink reservoir and on the other i piece for the reception of a pen or of a device for drawing lines. v

3. Fountain pen comprising in confibina'- tion with a hollow pen holder serving as an.

inlr reservoir having an openingin its wall arrangedv at a oint ,which isusually un accessible for t e init, va body inserted in said pen holder and stopA ing the open end @f lill@ Same being of Sma er diameter than hand with the atmosphere, small slots beopening in the wall of the pen holder, a4

cavity in the wall of said body opposite said opening of the pen holder for reducing the capillary action of said capillary space,

and a mouth piece forthe reception of a pen or of a device f or drawing lines.

4. .Fountain pen comprising in combination with ahollow pen holder serving as an ink reservoir, a body inserted in said pen holder and stopping the open end the samel being of smaller diameter than said pen holderso that between the outer surface of which body and the inner wall of the pen holder a separate capillary space is formed which is connected on the one hand with the ink reservoir and on the other hand with the atmosphere, a ring at lthe inner end of said body bearing against the inner wall of the. pen holder having a slot connecting said capillary spacel with the ink reservoir and a capillary oove as extension of said slot designe to retain ink even if the ink level in the reservoir stands below said capillary'groove, and a mouth piece for the reception of a' pen or of .ya device for drawing lines.- A

5. Fountain en comprising in combination with a hol ow pen holder serving as an ink reservoir, a body inserted in said pen holder and stopping the open end the same being of smaller diameter than said pen holder so that between the outer surface of which body and the inner wall of the pen holder aseparate capillary space is formed which is connected on the one hand with the ink reservoir and on the other hand with the atmosphere, a ring at the inner .endof said body bearing against thel inner wall ofthe pen holder having a slot connecting ,said capillary space with the ink reservoir and .a capillary groove as extension of said slot ldesigned to retain ink even if the ink level in the reservoir stands below said capillary groove, an extension at the outer end of said body having a capillary boring, and a mouth iece for the reception of a pen or of a evice for drawing lines.

6. Fountain pen comprising in combination witha hollow pen holder serving as an ink reservoir, a body inserted in said pen holder and stopping the open end the same -ture in presence being of smaller diameter than said en holder so that between the outer suriiace.

of which body and the inner wall of the pen holder a separate capillary space is formed which is connected on the one hand with the ink reservoir and on the other hand with the. atmosphere, a ringl at the inner end of said body bearing against the inner wall of the pen holder having a slot connecting said capillary space with the ink reservoir and a capillary groove as extension of said slot designed to retain ink even if the ink level in the reservoir stands 7. Fountain pen comprising in combination with a hollow pen. holder serving as an ink reservoir, a body inserted in sald pen holder and stopping the open end the same being of smaller diameter than said pen holder so that between the outer surface of which body and the inner wall of the pen holder a separate capillary space is formed which is connected on the one hand with the .ink reservoir and on the other hand' with the atmosphere, a ring at the inner endof said body bearing against the inner wall of the penholder having a slot connectingsaid capillary space with the ink reservoir and a capilla groove as extension of said slot designe to retain ink even if the ink level in the reservoir stands below said capillary groove,-an extension at the outer end of said body having a capillary boring and a mouth piece for drawlng thin lines being enlarged in one direction and forming a comparatively small tongue in a direction of with regard to the -irst direction mounted upon said extension. l

8. In a mouth-piece for pens, guiding surfaces on said mouth-piece, a separate member adapted to be inserted in the mouth-piece 'having two sharp chisel-like mines the thickness of the line to be drawn,

said edges-,being parallel with the guiding surfaces of the mouth' ieee. i

In testimony whereo I ailix my signaof two witnesses.

THEODO KOVCS.

Witnesses:V

RABBI SEECH, LEOPOLD MEYER.

edges, the distances between which deterl 

